Antenna device and background music multimedia equipment

Abstract

The present invention provides an antenna device and background music multimedia equipment. The length of the radiating part extends along a first direction. The length of the grounding connection part extends along a second direction, and the second direction is perpendicular to the first direction. The bandwidth adjustment part is connected between the radiating part and the grounding connection part. The bandwidth adjustment part is provided with a bandwidth adjustment gap, and the length of the bandwidth adjustment gap extends along the first direction. The feed source includes a feed point part and a ground feed part that are arranged at intervals. The feed point part is connected to the connection between the bandwidth adjustment part and the radiating part. The ground feed part is connected to the connection between the bandwidth adjustment part and the grounding connection part. In this way, the various parts of the antenna device are coordinated in an orderly manner, and the efficiency and gain are improved without increasing the size and area, thereby improving its own performance and meeting the requirements of antenna transmission.

Description

Technical Field

[0001] The present invention relates to the field of antenna technology, and in particular to an antenna device and background music multimedia equipment. Background Art

[0002] In the related art, the ZigBee module of the background music multimedia device can control the sub-devices in the smart home and play music. For example, the ZigBee module of the background music multimedia device is equipped with an antenna device, which can detect and control the working status of the sub-device to ensure the normal operation of the sub-device. However, the performance of the antenna device in most background music multimedia devices is poor and cannot meet the use requirements. Summary of the invention

[0003] The embodiments of the present invention provide an antenna device and a background music multimedia device to improve at least one of the above problems.

[0004] The embodiments of the present invention achieve the above-mentioned purpose through the following technical solutions.

[0005] In a first aspect, an embodiment of the present invention provides an antenna device. The antenna device includes a radiating portion, a ground connection portion, a bandwidth adjustment portion, and a feed source. The length of the radiating portion extends along a first direction. The length of the ground connection portion extends along a second direction, and the second direction is perpendicular to the first direction. The bandwidth adjustment portion is connected between the radiating portion and the ground connection portion. The bandwidth adjustment portion is provided with a bandwidth adjustment gap, and the length of the bandwidth adjustment gap extends along the first direction. The feed source includes a feed point portion and a ground feed portion that are arranged at intervals. The feed point portion is connected to the connection between the bandwidth adjustment portion and the radiating portion. The ground feed portion is connected to the connection between the bandwidth adjustment portion and the ground connection portion.

[0006] In some embodiments, the bandwidth adjustment portion includes a first adjustment section, a second adjustment section, and a third adjustment section connected in sequence. One end of the first adjustment section that is away from the second adjustment section is connected to the radiation section and the feed point section. One end of the third adjustment section that is away from the second adjustment section is connected to the ground feed section and the ground connection section. The length direction of the first adjustment section and the length direction of the third adjustment section are parallel to the first direction. The length direction of the second adjustment section is parallel to the second direction, and a bandwidth adjustment gap is formed between the first adjustment section, the second adjustment section, and the third adjustment section.

[0007] In some embodiments, the ground connection portion includes a first side edge and a second side edge that are opposite to each other, the first side edge and the radiation portion face the same side, and the second adjustment section protrudes from the second side edge.

[0008] In some embodiments, the length of the radiation portion along the first direction is 13-15 mm. The width of the radiation portion along the second direction is 0.5-2 mm. The length of the bandwidth adjustment gap along the first direction is 7-9 mm.

[0009] In some embodiments, a side of the radiation portion facing away from the ground connection portion is provided with an escape opening, and a width of the escape opening along the first direction is 7-9 mm.

[0010] In some embodiments, the length of the ground connection portion along the second direction is 13-18 mm, and the width of the ground connection portion along the first direction is 11-15 mm.

[0011] In some embodiments, the feed point portion and the ground feed portion are spaced apart and have a first gap therebetween, and the first gap is connected to the bandwidth adjustment gap.

[0012] In some embodiments, the feed point portion and the ground connection portion are spaced apart to form a second gap, and the second gap is connected to the first gap.

[0013] In some embodiments, the feed point portion includes a first gold-plated layer. The length of the first gold-plated layer along the second direction is 0.5 to 1.5 mm. The width of the first gold-plated layer along the first direction is 0.5 to 1 mm. The ground feed portion includes a second gold-plated layer. The length of the second gold-plated layer along the first direction is 1 to 3 mm. The width of the second gold-plated layer along the second direction is 1 to 2 mm.

[0014] The present invention also provides a background music multimedia device. The background music multimedia device includes a housing and a ZigBee module. The ZigBee module includes a circuit board and an antenna device of any of the above embodiments. The circuit board is arranged in the housing, and the feeding point part and the ground feeding part of the antenna device are both electrically connected to the circuit board.

[0015] The antenna device and background music multimedia device provided by the embodiment of the present invention. The antenna device includes a radiating part, a ground connection part, a bandwidth adjustment part and a feed source. Among them, the feed source includes a feed point part and a ground feed part arranged at intervals, the feed point part is connected to the connection between the bandwidth adjustment part and the radiating part, the ground feed part is connected to the connection between the bandwidth adjustment part and the ground connection part, and the length of the radiating part extends along the first direction, so that the feed point part feeds a current signal to the radiating part, so that the radiating part generates a specified working frequency band. In addition, the length of the ground connection part extends along the second direction, and the second direction is perpendicular to the first direction, so that the ground connection part can adjust the waveform depth of the antenna device. In addition, the bandwidth adjustment part is connected between the radiating part and the ground connection part, and the bandwidth adjustment part is provided with a bandwidth adjustment gap, and the length of the bandwidth adjustment gap extends along the first direction, thereby extending the routing of the antenna device, so that the bandwidth adjustment gap can adjust the bandwidth size and frequency of the antenna device. In this way, the various parts of the antenna device are coordinated in an orderly manner, and the efficiency and gain of the antenna device are improved without increasing the size and area, thereby improving its own performance and meeting the requirements of antenna transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A structural schematic diagram of an antenna device provided in an embodiment of the present invention is shown.

[0018] Figure 2 A structural schematic diagram of an antenna device provided in another embodiment of the present invention is shown.

[0019] Figure 3 A partial dimension schematic diagram of an antenna device provided in an embodiment of the present invention is shown.

[0020] Figure 4 Another partial dimension schematic diagram of the antenna device provided in an embodiment of the present invention is shown.

[0021] Figure 5 FIG. 4 is a schematic diagram showing the position of the antenna device provided in an embodiment of the present invention in a spatial rectangular coordinate system.

[0022] Figure 6 Shows Figure 5 Schematic diagram of the radiation direction of the antenna device at 2400 MHz.

[0023] Figure 7 Shows Figure 6 Schematic diagram of the H-plane radiation direction of the antenna device at 2400MHz.

[0024] Figure 8 Shows Figure 6 Schematic diagram of the E1 radiation direction of the antenna device at 2400 MHz.

[0025] Fig. 9 Shows Figure 6 Schematic diagram of the E2 radiation direction of the antenna device at 2400 MHz.

[0026] Fig.10 Shows Figure 5 Schematic diagram of the radiation direction of the antenna device at 2450 MHz.

[0027] Fig.11 Shows Fig.10 Schematic diagram of the H-plane radiation direction of the antenna device at 2450MHz.

[0028] Fig.12 Shows Fig.10Schematic diagram of the E1 radiation direction of the antenna device at 2450MHz.

[0029] Fig.13 Shows Fig.10 Schematic diagram of the E2 radiation direction of the antenna device at 2450MHz.

[0030] Fig.14 Shows Figure 5 Schematic diagram of the radiation direction of the antenna device at 2500 MHz.

[0031] Fig.15 Shows Fig.14 Schematic diagram of the H-plane radiation direction of the antenna device at 2500MHz.

[0032] Fig.16 Shows Fig.14 Schematic diagram of the E1 radiation direction of the antenna device at 2500MHz.

[0033] Fig.17 Shows Fig.14 Schematic diagram of the E2 radiation direction of the antenna device at 2500MHz.

[0034] Fig.18 A schematic structural diagram of a background music multimedia device provided by an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0037] ZigBee is a low-power LAN protocol based on the IEEE802.15.4 standard. It has the characteristics of low power consumption, low cost, low complexity, strong anti-interference ability, large network capacity, etc. It can support a variety of network topologies such as mesh network, star network, tree network, etc. ZigBee uses three different working frequency bands, namely 2.4GHz, 868MHz, and 433MHz, of which 2.4GHz is the mainstream working frequency band of ZigBee.

[0038] In actual research, the inventors of the present application found that the operating frequency, efficiency and antenna gain of the antenna radiation can be effectively adjusted by adjusting the wiring method of the antenna device. Therefore, designing the wiring spacing and length of the antenna device is an important factor in whether the antenna performance can be improved.

[0039] In view of this, the present invention proposes an antenna device, which can be applied to a ZigBee module of a background music multimedia device. For example, the ZigBee module is equipped with an antenna device, thereby generating a working frequency band near 2.4 GHz, thereby detecting and controlling the working conditions of sub-devices of a smart home. In the following embodiments, the application of the antenna device in a background music multimedia device is mainly used as an example for description and introduction, and other situations requiring an antenna device can be implemented with reference.

[0040] See also Figure 1 , the antenna device 10 includes a radiating portion 200, a ground connection portion 300, a bandwidth adjustment portion 400 and a feed source 100. Among them, the feed source 100 is connected to the radiating portion 200, the ground connection portion 300 and the bandwidth adjustment portion 400. The feed source 100 can feed a current signal to the incident portion, so that the radiating portion 200 operates in a specified frequency band. For example, the radiating portion 200 can generate a frequency band near 2.4 GHz. The ground connection portion 300 can adjust the frequency and waveform depth of the antenna device 10 (the waveform of the current or voltage in the network analyzer). The bandwidth adjustment portion 400 can adjust the bandwidth of the antenna device 10 so that the antenna device 10 operates in a good frequency range. In this way, the performance of the antenna device 10 can be improved by adjusting the position and shape of the feed source 100, the bandwidth adjustment portion 400, the ground connection portion 300 and the radiator.

[0041] Please also read Figure 1 and Figure 2 In some embodiments, the antenna device 10 may further include a dielectric layer 800 , which may be used to carry the routing of the radiation portion 200 , the ground connection portion 300 , the bandwidth adjustment portion 400 , and various parts of the radiation portion 200 , so that the antenna device 10 may be easily installed on the background music multimedia device 20 .

[0042] The feed source 100 includes a feed point portion 110 and a ground feed portion 120 , and the feed point portion 110 and the ground feed portion 120 are spaced apart from each other to avoid direct contact between the feed point portion 110 and the ground feed portion 120 and thus prevent the antenna device 10 from being short-circuited.

[0043] The feed point portion 110 is connected to the connection between the bandwidth adjustment portion 400 and the radiating portion 200, so that the feed point portion 110 can feed a current signal to the bandwidth adjustment portion 400 and the radiating portion 200, so that the bandwidth adjustment portion 400 can adjust the bandwidth of the antenna device 10, and the radiating portion 200 can generate a specified working frequency band. The feed point portion 110 includes a first gold-plated layer 111, and the first gold-plated layer 111 is plated with metal gold. The first gold-plated layer 111 can enhance the conduction characteristics between the feed point portion 110 and the radiator and the bandwidth adjustment portion 400, which is conducive to better anti-oxidation and not easily corroded by air, and is also conducive to reducing signal interference and loss. In this embodiment, Figure 3 As shown, the first gold-plated layer 111 is arranged along a first direction (eg Figure 1 The width of the first gold-plated layer 111 along the second direction (such as the X direction) is L1, wherein the value range of L1 is 0.5-1 mm, for example, L1 can be but is not limited to: 0.7 mm, 0.75 mm or 0.8 mm. Figure 1 The first direction may be perpendicular to the second direction. The length of L2 is L2, wherein the value of L2 is 0.5 to 1.5 mm, for example, L2 may be, but is not limited to, 0.9 mm, 1.0 mm or 1.2 mm.

[0044] The ground feed part 120 is connected to the connection between the bandwidth adjustment part 400 and the ground connection part 300, so that the ground connection part 300 can be grounded and the bandwidth adjustment part 400 can cooperate with the ground connection part 300. The ground feed part 120 also includes a second gold-plated layer 121, and the second gold-plated layer 121 is plated with metal gold. The second gold-plated layer 121 can enhance the conduction characteristics between the ground feed part 120 and the ground connection part 300 and the bandwidth adjustment part 400, which is conducive to better anti-oxidation and not easily corroded by air, and at the same time helps to reduce signal interference and loss. In this embodiment, Figure 3 As shown, the length of the second gold-plated layer 121 along the first direction is L3, wherein the value range of L3 is 1 to 3 mm, for example, L3 can be but not limited to: 1.5 mm, 2 mm or 2.5 mm. The length of the second gold-plated layer 121 along the second direction is L4, wherein the value range of L4 is 1 to 2 mm, for example, L4 can be but not limited to: 1.0 mm or 2 mm.

[0045] The bandwidth adjustment part 400 can be connected between the radiation part 200 and the ground connection part 300 to facilitate the cooperation between the bandwidth adjustment part 400, the radiation part 200 and the ground connection part 300, so as to tune the bandwidth of the antenna device 10 so that the antenna device 10 has a good operating frequency.

[0046] The bandwidth adjustment unit 400 may be provided with a bandwidth adjustment gap 501 , the length of which extends along the first direction, thereby extending the routing of the antenna device 10 , so that the bandwidth adjustment unit 400 can tune the bandwidth, which is beneficial to improving the efficiency and gain of the antenna device 10 .

[0047] Further, the bandwidth adjustment section 400 includes a first adjustment section 410, a second adjustment section 420 and a third adjustment section 430 connected in sequence, one end of the first adjustment section 410 away from the second adjustment section 420 is connected to the radiation section 200 and the feed point section 110, and one end of the third adjustment section 430 away from the second adjustment section 420 is connected to the ground feed section 120 and the ground connection section 300. The length direction of the first adjustment section 410 and the length direction of the third adjustment section 430 are parallel to the first direction, and the length direction of the second adjustment section 420 is parallel to the second direction, so that a bandwidth adjustment gap 501 is formed between the first adjustment section 410, the second adjustment section 420 and the third adjustment section 430, so as to facilitate tuning the bandwidth of the antenna device 10. In this embodiment, as Figure 4 As shown, the length of the bandwidth adjustment gap 501 along the first direction is L5, and the value range of L5 is 7 to 9 mm. For example, L5 can be but is not limited to: 7.5 mm, 8 mm or 8.5 mm.

[0048] The length of the radiation portion 200 extends along the first direction, which lengthens the routing of the antenna device 10 and reduces the frequency of the antenna device 10, which is beneficial to improving the efficiency and gain of the antenna device 10. The radiation portion 200 can be connected to the feed point portion 110 to generate an operating frequency band near 2.4 GHz. Figure 4 As shown, the length of the radiation portion 200 along the first direction is L6, wherein the value range of L6 is 13-15 mm, for example, L6 can be but not limited to: 13.5 mm, 14 mm or 14.5 mm. The width of the radiation portion 200 along the second direction is L7, wherein the value range of L7 is 0.5-2 mm, and L7 can be but not limited to: 1.0 mm or 1.5 mm.

[0049] In some embodiments, a side of the radiating portion 200 facing away from the ground connection portion 300 is provided with an avoidance opening 504, which can facilitate the installation of the antenna device 10 on the background music multimedia device 20, and extend the routing of the radiating portion 200, thereby reducing the frequency of the radiating portion 200, so as to work in a frequency band near 2.4 GHz. Figure 4 As shown, the width of the avoidance opening 504 along the first direction is L8, wherein the value range of L8 is 7-9 mm, and L8 can be but is not limited to: 7.5 mm, 8 mm or 8.5 mm.

[0050] The length of the ground connection portion 300 extends along the second direction, so that the ground connection portion 300 can adjust the waveform depth of the bandwidth of the antenna device 10, thereby facilitating improving the efficiency and gain of the antenna device 10. Figure 4 As shown, the width of the ground connection portion 300 along the first direction is L9, wherein the value range of L9 is 11-15 mm, for example, L9 can be but not limited to 12 mm, 13 mm or 14 mm. The length of the ground connection portion 300 along the second direction is L10, wherein the value range of L10 is 13-18 mm, for example, L10 can be 14 mm, 15 mm, 16 mm or 17 mm.

[0051] In some embodiments, the ground connection portion 300 includes a first side 401 and a second side 402 relative to each other, the first side 401 and the radiation portion 200 face the same side, and the second adjustment section 420 protrudes from the second side 402, so that the ground connection portion 300, the radiation portion 200 and the bandwidth adjustment portion 400 cooperate with each other to improve the efficiency and gain of the antenna device 10.

[0052] In some embodiments, the feed point portion 110 and the ground feed portion 120 are spaced apart and have a first gap 502 , the first gap 502 is connected to the bandwidth adjustment gap 501 , and the first gap 502 helps to avoid direct contact between the feed point portion 110 and the ground feed portion 120 .

[0053] In some embodiments, the feed point portion 110 and the ground connection portion 300 are spaced apart to form a second gap 503, and the second gap 503 is connected to the first gap 502, thereby preventing the feed point portion 110 from contacting the ground connection portion 300 and causing a short circuit in the antenna device 10, thereby ensuring that the ground connection portion 300 can operate normally.

[0054] Please refer to Table 1, which shows the frequencies and standing wave ratio values ​​of multiple measurement points of the antenna device 10 of the above embodiment obtained by testing with a network analyzer.

[0055] Table 1

[0056] Frequency(MHZ) 2400 2500 VSWR 1.19 1.42

[0057] It can be seen from the above-mentioned standing wave ratio values ​​that the standing wave ratio values ​​of most antenna devices 10 applied to 2.4 GHz are in the range of 1.5 to 1.7. Therefore, the antenna device 10 of the embodiment of the present application has the advantage of a low standing wave ratio value.

[0058] Please refer to Table 2. According to the antenna device 10 of the above embodiment, the gains and efficiencies corresponding to different frequencies in actual tests are shown in Table 2.

[0059] Table 2

[0060]

[0061] From the test data in Table 2, it can be seen that in the frequency band of 2400 to 2500 MHz, the maximum gain is between 1.69 and 2.9 dBi (much higher than the maximum gain of similar background music multimedia devices 20), and the radiation efficiency is between 50.67% and 51.75%. The radiation efficiency of the antenna device 10 of the embodiment of the present application is higher than 50% when transmitting and receiving the working frequency band near 2.4 GHz (the antenna device 10 of the background music multimedia device 20 is mainly used to control the sub-device, and the radiation efficiency is generally higher than 40%, which meets the requirements.), and the maximum gain and radiation efficiency of the antenna device 10 are obviously higher, meeting the use requirements.

[0062] See also Figure 5 , Figure 5 A schematic diagram of the position of an antenna device 10 provided in an embodiment of the present application in a spatial rectangular coordinate system is shown. In the spatial rectangular coordinate system O-xyz, the antenna device 10 is located in the xOz coordinate plane, and the origin of the coordinate axis is approximately located in the middle position of the antenna device 10, which is conducive to the detection of the antenna device 10.

[0063] See also Figures 6 to 9 , Figure 6 The figure shows the radiation pattern of the antenna device 10 provided in the embodiment of the present application at 2400MHz in a spatial rectangular coordinate system. The center point of the figure represents the position of the antenna. The farther from the center point, the greater the gain. The darker the color, the greater the gain of the antenna. Figure 7 is the radiation pattern of the H plane (the H plane is the plane where the magnetic field and the maximum radiation direction are located), Figure 8 is the radiation pattern of the E1 plane (the E plane is the plane with the maximum radiation direction and the electric field), Fig. 9 It is the radiation pattern of the E2 plane (the E plane is the plane with maximum radiation direction and electric field). Figures 7 to 9 The radiation patterns shown extend in multiple directions and have high gains. That is to say, in the plane where the antenna device 10 is located and in the plane perpendicular to the antenna device 10, the gain and efficiency of the antenna device 10 are high, and omnidirectional radiation can be achieved without being affected by direction. Therefore, the position of the antenna device 10 can be reasonably set according to actual needs to improve practicality.

[0064] See also Figures 10 to 13 , Fig.10 The figure shows the radiation pattern of the antenna device 10 provided in the embodiment of the present application at 2450MHz in a spatial rectangular coordinate system. The center point of the figure represents the position of the antenna. The farther from the center point, the greater the gain. The darker the color, the greater the gain of the antenna. Fig.11 is the radiation pattern of the H plane (the H plane is the plane where the magnetic field and the maximum radiation direction are located), Fig.12 is the radiation pattern of the E1 plane (the E plane is the plane with the maximum radiation direction and the electric field), Fig.13 It is the radiation pattern of the E2 plane (the E plane is the plane with maximum radiation direction and electric field). Figures 11 to 13 The radiation patterns shown extend in multiple directions and have high gains. That is to say, in the plane where the antenna device 10 is located and in the plane perpendicular to the antenna device 10, the gain and efficiency of the antenna device 10 are high, and omnidirectional radiation can be achieved without being affected by direction. Therefore, the position of the antenna device 10 can be reasonably set according to actual needs to improve practicality.

[0065] See also Figures 14 to 17 , Fig.14 The figure shows the radiation pattern of the antenna device 10 provided in the embodiment of the present application at 2500MHz in a spatial rectangular coordinate system. The center point of the figure represents the position of the antenna. The farther from the center point, the greater the gain. The darker the color, the greater the gain of the antenna. Fig.15 is the radiation pattern of the H plane (the H plane is the plane where the magnetic field and the maximum radiation direction are located), Fig.16 is the radiation pattern of the E1 plane (the E plane is the plane with the maximum radiation direction and the electric field), Fig.17 It is the radiation pattern of the E2 plane (the E plane is the plane with maximum radiation direction and electric field). Figures 15 to 17 The radiation patterns shown extend in multiple directions and have high gains. That is to say, in the plane where the antenna device 10 is located and in the plane perpendicular to the antenna device 10, the gain and efficiency of the antenna device 10 are high, and omnidirectional radiation can be achieved without being affected by direction. Therefore, the position of the antenna device 10 can be reasonably set according to actual needs to improve practicality.

[0066] See also Fig.18 The present invention also proposes a background music multimedia device 20, which can be used to control the sub-devices of a smart home. For example, the background music multimedia device 20 can detect and control the working status of the sub-devices of the smart home to ensure that the sub-devices of the smart home work. The background music multimedia device 20 includes a housing and a ZigBee module 30, and the ZigBee module 30 is arranged in the housing, so that the working status of the sub-devices of the smart home can be detected and controlled by the ZigBee module 30. In addition, the background music multimedia device 20 can also have functions such as playing music and videos.

[0067] In some embodiments, the ZigBee module 30 includes a circuit board 700 and the antenna device 10 of the above embodiment, which are electrically connected, and the feed point portion 110 and the ground feed portion 120 of the antenna device 10 are both electrically connected to the circuit board 700. The specific structure of the antenna device 10 refers to the above embodiment. Since the background music multimedia device 20 adopts all the technical solutions of all the above embodiments, it also has all the beneficial effects brought by the technical solutions of the above embodiments of the antenna device 10, which will not be repeated here.

[0068] In some embodiments, the antenna device 10 can be connected to the circuit board 700 through a coaxial line 900. The coaxial line 900 includes a signal line and a ground connection line (in order to make the figure simple, the signal line and the ground connection line are not shown), the ground connection line is wrapped around the periphery of the signal line, the signal line is connected to the feed point part 110, and the ground connection line is connected to the ground feed part 120. The antenna device 10 can be electrically connected to the circuit board 700 of the background music multimedia device 20 through the coaxial line 900. The coaxial line 900 can be provided with a plug for connecting the signal line and the ground connection line, and the circuit board 700 is provided with a socket, and the plug is plugged into the socket, so that the antenna device 10 is connected to the circuit board 700, and then the radio frequency circuit of the circuit board 700 transmits the signal to the feed source 100.

[0069] In some embodiments, the antenna device 10 may be adhered to the circuit board 700 via the dielectric layer 800 , thereby facilitating reasonable arrangement of the antenna device 10 on the circuit board 700 .

[0070] In the present invention, unless otherwise clearly specified or limited, the terms "installation", "connection" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an integral connection, or a transmission connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as a specific reference or special structure. The description of the term "some embodiments" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In the present invention, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present invention and the features of the different embodiments or examples without contradiction.

[0072] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. An antenna device, characterized in that: include: A radiation portion, wherein the radiation portion extends along a first direction; A grounding connection portion, wherein the length of the grounding connection portion extends along a second direction, and the second direction is perpendicular to the first direction; a bandwidth adjustment portion, the bandwidth adjustment portion being connected between the radiation portion and the ground connection portion, the bandwidth adjustment portion being provided with a bandwidth adjustment gap, the length of the bandwidth adjustment gap extending along the first direction; as well as A feed source, the feed source comprising a feed point portion and a ground feed portion which are arranged at intervals, the feed point portion being connected to a connection between the bandwidth adjustment portion and the radiation portion, and the ground feed portion being connected to a connection between the bandwidth adjustment portion and the ground connection portion; In which, the bandwidth adjustment part includes a first adjustment section, a second adjustment section and a third adjustment section connected in sequence, one end of the first adjustment section facing away from the second adjustment section is connected to the radiation section and the feeding point section, one end of the third adjustment section facing away from the second adjustment section is connected to the ground feeding section and the ground connection section, the length direction of the first adjustment section and the length direction of the third adjustment section are parallel to the first direction, the length direction of the second adjustment section is parallel to the second direction, and the bandwidth adjustment gap is formed between the first adjustment section, the second adjustment section and the third adjustment section.

2. The antenna device according to claim 1, characterized in that The ground connection portion includes a first side and a second side that are opposite to each other, the first side and the radiation portion face the same side, and the second adjustment section protrudes from the second side.

3. The antenna device according to claim 1, characterized in that The length of the radiation portion along the first direction is 13-15 mm, the width of the radiation portion along the second direction is 0.5-2 mm, and the length of the bandwidth adjustment gap along the first direction is 7-9 mm.

4. The antenna device according to claim 3, characterized in that: A side of the radiation portion facing away from the ground connection portion is provided with an escape opening, and a width of the escape opening along the first direction is 7-9 mm.

5. The antenna device according to claim 4, characterized in that: The length of the ground connection portion along the second direction is 13-18 mm, and the width of the ground connection portion along the first direction is 11-15 mm.

6. The antenna device according to claim 1, characterized in that: The feed point portion and the ground feed portion are spaced apart from each other and have a first gap therebetween, and the first gap is connected to the bandwidth adjustment gap.

7. The antenna device according to claim 6, characterized in that: The feeding point portion and the ground connection portion are spaced apart to form a second gap, and the second gap is connected to the first gap.

8. The antenna device according to claim 1, characterized in that The feeding point portion includes a first gold-plated layer, the length of the first gold-plated layer along the second direction is 0.5 to 1.5 mm, and the width of the first gold-plated layer along the first direction is 0.5 to 1 mm. The ground feeding portion includes a second gold-plated layer, the length of the second gold-plated layer along the first direction is 1 to 3 mm, and the width of the second gold-plated layer along the second direction is 1 to 2 mm.

9. A background music multimedia device, characterized in that: include: case; as well as A ZigBee module, the ZigBee module comprising a circuit board and the antenna device according to any one of claims 1 to 8, the circuit board being arranged in the shell, the feeding point part and the ground feeding part of the antenna device being electrically connected to the circuit board.

Images